Italy, France and Germany issued a statement of unity on Thursday following President Trump's decision to withdraw the United States from the landmark Paris agreement. The European allies said they regretted Trump's decision and dismissed the suggestion that the deal could be renegotiated, Reuters reported.

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"We deem the momentum generated in Paris in December 2015 irreversible and we firmly believe that the Paris Agreement cannot be renegotiated since it is a vital instrument for our planet, societies and economies," the leaders of the three countries said in a rare joint statement.

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UPDATE 4:08 p.m. EST:

Delivering on a promise, Elon Musk has resigned from the presidential council after Trump announced that the US will drop the Paris agreement.

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UPDATE 3:42 p.m. EST:

Former President Obama, who helped ratify the climate deal a year and a half ago, responded to President Trump's decision to withdraw from the Paris agreement with notable optimism--expressing confidence that states and cities will continue the legacy of environmental protection.

"The nations that remain in the Paris Agreement will be the nations that reap the benefits in jobs and industries created," he said in a statement.

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He continued, "I believe the United States of America should be at the front of the pack. But even in the absence of American leadership; even as this Administration joins a small handful of nations that reject the future; I'm confident that our states, cities, and businesses will step up and do even more to lead the way, and help protect for future generations the one planet we've got."

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UPDATE 3:39 p.m. EST:

President Trump announced on Thursday afternoon from the White House Rose Garden that the United States will break ranks with more than 190 countries to withdraw from the Paris Climate Accord.

In order to fulfill my solemn duty to protect American and its citizens, the United States will withdraw from the Paris climate accord.

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Continuing, the 45th-commander-in-chief said the U.S. will begin to negotiate to re-enter either the Paris accord or an entirely "new transaction."

"So we're getting out," Trump said. And we will see if we can make a deal thats fair. And if we can, that's great. And if we can't, that's fine."

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ORIGINAL STORY: Leaked talking pointed obtained by various media outlets reported that President Trump will pull out of the landmark Paris climate agreement, Politico reported. The news surfaced minutes before Trump is expected to deliver remarks from the White House Rose Garden on the fate of the environmental pact.

In the talking points, Trump is expected to discuss how the international deal undermines US competitiveness and jobs as well as how the "badly negotiated" deal does little for the climate.

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"The Paris Accord is a BAD deal for Americans, and the President's action today is keeping his campaign promise to put American workers first," the memo read. "The Accord was negotiated poorly by the Obama Administration and signed out of desperation. It frontloads costs on the American people to the detriment of our economy and job growth while extracting meaningless commitments from the world's top global emitters, like China. The U.S. is already the leading world in energy production and doesn't need a bad deal that will harm American workers."

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WATCH | Here are five consequences if Trump pulls the United States out of the Paris climate deal.

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So far, 147 countries have ratified the agreement. Trump's decision to ditch the deal aligns it with countries such as Syria and Nicaragua, according to CNN.

Trump's decision comes after weeks of speculation and pressure from his close associates pulling him in different policy directions. The 45th-commander-in-chief reportedly faced intense pressure from his daughter Ivanka Trump, who urged her father to stay in the deal. Secretary of State Rex Tillerson also encouraged Trump to maintain the deal.

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Meanwhile, Trump's other close allies, including strategist Steve Bannon and EPA administrator Scott Pruitt, have pulled the president in the opposite direction, Politico reported.